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Description/Abstract

We report on CW quasi-phase-matched intracavity frequency doubling of a 1.064µm Nd:YAG laser. The 5 mm long and 0.2 mm thick crystal of periodically poled LiNbO3 was Brewster angle cut. When located intracavity, it presented an effective nonlinear coefficient d(33) of 4.5 pm/V and an estimated loss per pass less than 10%. The observed temperature bandwidth of approximately 5K compares favourably with the theoretical value.